Since you've completed puzzle 11, the loss of the GC won't affect your completion of the game. There are a total of three huts that your villagers can build, and the maximum village population is reached when they will no longer make new baby villagers due to lack of housing.

If you get totally stuck on puzzle 12, check out the topic "Help with the puzzles" near the top of the Village Sim forum. People have asked us not to put solutions to the puzzles in the forum (and we try to tag other spoilers so that we don't ruin the game for people)!
